Dynamic model for sucking process of pneumatic cutting-type safflower harvest device
Keywords:
safflower petal, pneumatic harvest device, dynamic model, sucking processAbstract
Abstract: This study proposed a method using negative pressure sucking the petals adhered around cones. The structural parameters of the sucking device affect the flow-field distribution in the negative-pressure air chamber. In order to improve the harvesting efficiency and quality of the pneumatic cutting-type safflower harvest device, a dynamic model was established and the safflower petals upwind area were measured. According to the test, the size parameters of the thornless Yumin safflower were as follows: the average necking diameter was 6.30 mm, the average capitulum diameter was 20.89 mm and the average petal length was 22.39 mm. The measured maximum frontal area of the safflower petal was 11-40 mm2. Secondly, the required negative pressure power that resulted in the rise of safflower petals was calculated. In general, when the suction of the negative pressure reaches 9.8 m/s, the safflower petals can be sucked successfully. The simulation of the flow field in the suction mouth indicated that the streamlined suction mouth was beneficial in reducing resistance and the test results of high-speed photography showed that the aforementioned condition could improve the efficiency of the upright safflower. And the test verified that the rate of the unshaped petals in the cylindrical air tunnel was low and the efficiency of carding and shaping under negative pressure was considerably better in wet petals than in dry ones. Results of the upright safflower petal experiment were consistent with the theoretical analysis and simulation conclusion, and indicated the precision of the dynamic model and suction flower mouth orifice-shaped simulation analysis. Keywords: safflower petal, pneumatic harvest device, dynamic model, sucking process DOI: 10.3965/j.ijabe.20160905.2139 Citation: Ge Y, Zhang L X, Qian Y, Jiao X P, Chen Y B. Dynamic model for sucking process of pneumatic cutting-type safflower harvest device. Int J Agric & Biol Eng, 2016; 9(5): 43-50.References
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[2] Azari A, Khajehpour M R. Effect of planting pattern on development, growth, yield components and seed and petal yields of safflower in summer planting, local variety of Isfahan, Koseh. Journal of Science & Technology of Agriculture & Natural Resources, 2005; 9(3): 131–142.
[3] Dashti S, Alahdadi I, Behbahani S M R, Nazarifar M H. Zoning and quantitative evaluation for safflower. Asian Journal of Agricultural Sciences, 2012; 4(6): 373–378.
[4] Mc Guire P E, Damania A B, Qualset C O. Safflower in California. The Paulden F. Knowles personal history of plant exploration and research on evolution, genetics, andbreeding. Agronomy Progress report No.313, Dept. of Plant Sciences. University of California, Davis, CA, USA, 2012.
[5] Guo M L, Zhang Z Y, Zhang H M, Su Z W. Effects of collecting time and processing methods on the quality of safflower crude drug. Acad J Sec Mil Med Univ.1999; 20(8): 535–537. (in Chinese with English abstract)
[6] Rajvanshi A K. Development of safflower petal collector. Vith International Safflower Conference, İstanbul-Turkey, 6-10 June, 2005. Safflower: A Unique Crop for Oil Spices and Health Consequently, A Better Life for You. 2005; 2.4, 80-85.
[7] Azimi S, Chegini G, Kianmehr M H, Heidari A. Design and construction of a harvesting safflower petals machine. Mechanics & Industry, 2012; 13(5): 301–305.
[8] Ge Y, Zhang L X, Han D D, Chen J P, Fu W. Current state and development trend of the mechanical harvesting on saffron filaments. Journal of Agricultural Mechanization Research, 2014; 36(11): 265–268. (in Chinese with English abstract).
[9] Antonelli M G, Auriti L, Zobel P B, Raparelli T. Development of a new harvesting module for saffron flower detachment. The Romanian Review Precision Mechanics Optics & Mechatronics, 2011; 39: 163–168.
[10] National Agricultural Machinery Standardization Technical Committee of Agricultural Mechanization. NY/T1133-2006 Job quality cotton picker. Beijing: China Agriculture Press. 2006. (in Chinese)
[11] Shahbazi F, Galedar M N, Taheri-Garavand A, Mohtasebi S S. Physical properties of safflower stalk. International Agrophysics, 2011; 25(3): 281–286.
[12] Viswanathan R, Pandiyarajan T, Varadaraju N. Physical and mechanical properties of tomato fruits as related to pulping. Journal of Food Science and Technology, 1997; 34(6): 537–539.
[13] Li Z G, Li P P, Liu J Z. Physical and mechanical properties of tomato fruits as related to robot’s harvesting. Journal of Food Engineering, 2011; 103(2): 170–178.
[14] Xia H M, Li Z W, Wang L Y. Research on suction species dynamic model of pneumatic suction plate vegetable seed metering device. South China Agricultural University, 2011; 32(1): 112–116. (in Chinese with English abstract)
[15] Singh R C, Singh G, Saraswat D C. Optimisation of design and operational parameters of a pneumatic seed metering device for planting cottonseeds, 2005; 92(4): 429–438.
[16] Karayel D. Performance of a modified precision vacuum seeder for no-till sowing of maize and soybean. J Soil Till Res, 2009; 104(1): 121–125.
[17] Hayashi S, Shigematsu K, Yamamoto S, Kobayashi K, Kohno Y, Kamata J, et al. Evaluation of a strawberry-harvesting robot in a field test. Biosystems Engineering, 2010; 105(2): 160–171.
[18] Sui R X, Thomasson J A, To S D F. Cotton-harvester-flow simulator for testing cotton yield monitors. Int J Agric & Biol Eng, 2010; 3(1): 44–49.
[19] Singh R C, Singh G, Saraswat D C. Optimisation of design and operational parameters of a pneumatic seed metering device for planting cottonseeds. Biosystems Engineering, 2005; 92(4): 429–438.
[20] Zhang Y C. Hydrodynamics. Beijing: Higher Education Press. 2007. pp. 398–421. (in Chinese).
[21] Wang J K, Guo K Q, Lü X M, Jiang B, Li B. High-speed photography analysis on improved clamping dibbler for cotton. Transactions of the CSAM, 2011; 42(10): 74–78. (in Chinese with English abstract).
[22] Thurner P J, Erickson B, Jungmann R. High-speed photography of compressed human trabecular bonecorrelates whitening to microscopic damage. Engineering Fracture Mechanics, 2007; 74(12): 1928–1941.
[23] Gradian A J, Rice E F. Experiments in high-speed photography. Tech Directions, 2015; 75(4): 15–17.
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Published
2016-09-30
How to Cite
Yun, G., Lixin, Z., Ying, Q., Xiaopan, J., & Yuanbo, C. (2016). Dynamic model for sucking process of pneumatic cutting-type safflower harvest device. International Journal of Agricultural and Biological Engineering, 9(5), 43–50. Retrieved from https://ijabe.migration.pkpps03.publicknowledgeproject.org/index.php/ijabe/article/view/2139
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Power and Machinery Systems
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